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DIGITAL FILTER FOR QUADRATURE SUB-SAMPLE DELAY ESTIMATION

机译:用于正交子样本延迟估计的数字滤波器

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摘要

In this paper we present a novel digital filter intended forrnquadrature sub-sample delay estimation based on the Hilbertrn(complex) filtering and fractional delaying of an incoming realvaluedrnsignal. It is a Hilbert Transform Filter (HTF) havingrnvariable fractional delay (VFD). The filter is based on a pair ofrnrotated VFD filters in the Farrow structure. It is capable ofrnperforming the Hilbertian as well as VFD filtering of the incomingrndiscrete-time signal at the same time. Thus one can substitute arnhitherto used cascade of the HTF and the VFD filters with anrnaggregated HTF-VFD filter proposed here. The technique isrnsimple to implement. The advantages lie in lower total delayrnintroduced by the compound filter and in modular structure, whichrnis composed of the same linear-phase rotated VFD Farrow subfilters.rnThe overall rotated VFD filters in the pair differ only in thernvalue of one parameter – the VFD. The proposed filter can bernapplied to adaptive quadrature sub-sample estimation of delay.
机译:在本文中,我们基于Hilbertrn(复杂)滤波和输入实数值信号的分数延迟,提出了一种用于正交正交采样延迟估计的新型数字滤波器。它是具有可变分数延迟(VFD)的希尔伯特变换滤波器(HTF)。该滤波器基于Farrow结构中一对旋转的VFD滤波器。它能够同时对输入的离散时间信号执行希尔伯特(Hilbertian)以及VFD滤波。因此,可以用这里提出的非聚集式HTF-VFD滤波器代替arnhitherto所使用的HTF和VFD滤波器的级联。该技术实施起来很简单。优点在于由复合滤波器和模块化结构引入的总延迟较低,该延迟由相同的线性相位旋转VFD Farrow子滤波器组成。一对中的整体旋转VFD滤波器仅在一个参数-VFD的值上有所不同。所提出的滤波器可以应用于延迟的自适应正交子样本估计。

著录项

  • 来源
  • 会议地点 Poznan(PL);Poznan(PL)
  • 作者

    Ewa Hermanowicz;

  • 作者单位

    Multimedia Systems Department, Faculty of Electronics, Telecommunications and InformaticsrnGdansk University of Technology, Gdansk, Polandrne-mail: hewa@eti.pg.gda.pl;

  • 会议组织
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 通信理论;
  • 关键词

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